Improvement in injectors



ivrrnn S'rafrns Barnim @rrr-oa.

JUILIUS PROEGER, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN `INJECTOR'S.

Specification forming part of Letters Patent No. 189,259, dated April 3, 1877; application tiled March l0, 1877.

To all whom it mag/concern:

Beit known that I, JU-Lius IRoEcrnin'of Pittsburg, in the county -ot Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Injectors; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being' had to the accompanying drawings, forming part of this specification, in which- Figure l is a longitudinal central section of an injector embodying myimprovemcnts. Fig. 2 is a detached enlarged view of the jet, .combining-tube, and reducing-cylinder. Fig. 3 is a vdetached view of the valve ofthe overflownozzle.

Like letters refer to like parts wherever they occur.

My invention relates `to the constructionl of injectors, for feeding water tov steam-boilers, and for like purposes wherever injectors are employed.

I will now proceed todescribe my invention, so that others skilled in the art to which it appertains may apply the same.

A is the injector-head or main casting, either flanged or tapped, as at a, for the attachment of the valve-chamber. B, and also as at a4, for the attachment of the delivery-tube C, provided with the usual water-inlet and overllowexits, al a2, and having the steam passage or passages a3 of the overflow formed in the casting and continuing through the same, so as to connect with the valve-chamber B, the lastnamed construction being a feature of a former patent to me.

B is the valve-chamber or steam-chest, provided with the steam-inlet B1, and divided by partitions b b1, through which are openings,

ground or otherwise finished, to form seats for valves c c1, secured to or formed on a common stem, C1, which works through astuf'ngbox, C2, on the steam-chest or valve-chamber B. The valve c controls the port or passage c, which conducts steam to the jet, while the valve c1 controls a passage, el, which connects, by an annular or other passage, c2, with the passages a3 of the overflow.

Secured to the valvechamber or steam-chest B, and projecting into the main casting or injector-head A, is a steam-jet, f, preferably formed with a'central cone, f1, so as to obtain an annulardischarge-orifice. gis the combin ving-tube, arranged within the head A, and secured thereto bya thread tapped in the casting. The combining-tube g is extended somewhat at its discharge end, and cupped, as at g1, to receive the end of thedelivery-tube U, and to form therewith an annular waterway or channel, which connects with the| overflow. Surrounding the discharging end of the combining-.tube and the receivingend of the delivery-tube, and projecting into the overflow port or channel, isa steam nozzle or jet, s,se cured in the main castingin like manner to the combining-tube. This jet receives steam fromv the chest B through lthe port or ports a3,

and forms, with the combining-tube, Snc., a lift which will act as eftectually with hot feedwater as with cold.

When the injector (jet and combining tube) is .used'as a lift, it becomes necessary to reduce the capacity of the inlet between the jet and combining-tube or the water-way; but in order to work ei'ectively, it is also desirable to reduce the size of the jet. For the above purpose a reducing-cylinder, h, having an annular recess, t', is slipped upon the receiving en d of the combining-tube, and is made adjustable by .means ot' the eccentric 7c or other suitable means. When the eccentric is employed, it maybe held against the sleeve or reducer 4by means of a spiral spring, l, as shown.

The reducingcylinder h is formed with a bell `or funnel mouth, m, so shaped and arranged, relatively to the jet f, that when the bellmouth m ot' the cylinder is pushed against the jet it will reduce the steam-exit one-hall', one-third, or other desired amount, as indicated by dotted line, Fig. 2; and in order to admit the water to the combining-tube when h is -in the position specified, the reducing-cylinder is perforated, as at n. By the above or equivalent means I am enabled to reduce the amount of water entering the combining-tube, while retaining the full jet, or to reduce both jet and water-supply, at pleasure. The delivery-tube C is of the usual form, with the exception that, in order to obtain the best results, I taper the receiving end, and extend it within the cupped end ofthe combining-tube and its jet.

D indicates the overflow-nozzle, which I secure to the main casting or injector-head by a swivel-nut, D1, the parts d d1 being ground to fit closely, so that by loosening the said nut the nozzle may be changed to any desired position, according as the injector is placed vertically or horizontally.

WVithin the overflow-nozzle is the valvev d2, the same heilig a hollow cylinder, beveled at two or more points, o ol, and ground to fit seats r r1, one above and the other below the overflow port, the pressure which lifts the valve being exerted below the upper seat, and the discharge being direct, as indicated by arrow, and not tortuons, as is common. In order to close the nozzle, when the injector steam is to be forced back into the feed-water tank, a stem, d4, passes centrally of the nozzle D and cylindrical valve d2, and is furnished 'at its lower end witha valve, 19, which has its seat p1 in the nozzle below those of the cylindrical valve, which provision enables the overiiow to be closed without forcing the cylindrical valve upon its seat, and without liability of defacing or injuring saidmvalvc.

For the purposes of the hollow cylindrical valve the stem d4 may be solid, and the valve 1i formed thereon; but as it is sometimes desirable in non-lifting injectors to change the overliow-valve, (shown for a central sleeve and poppet-valve,) I preferably form the stein d* and valve p in two pieces, the upper being hollow, or having a port passing through it, and the lower `being detachable, for reasons that will hereinafter appear.

In cases where theinjector draws its feedwater from a head, or is a non-liftin g injector,

the construction of the valve of the overflow` may bevaried by tting within the nozzle a hollow cylinder or sleeve, whose upper end serves as a seat for a disk or poppet valve, the hollow cylinder serving asthe discharge-tube. I/Vhen such a valve :is to be substituted for the valve first mentioned the valve p is detached from stem d", and'cylindrical valve d2 is replaced by the sleeve and disk. The port through stem d4 will relieve the disk-valve of pressure, so that it can act freely, and when the overiiow-nozzle is to be closed the same can be accomplished by screwing down stem d* until it forces the disk upon its seat. 1nstead of the hollow stem d4 a port may he madein the nozzle above the disk for use with the last-named valve.

The operation of my devices is as follows: Steam is admitted to valve-chamber B, and the stem Gl manipulated to uncover port el and permit the steam to pass by passage a3 to jets, surrounding the adjacent ends of combilling and delivery tube, thus creating` a vacnum in the injector and lifting the feed-water, either hot or cold. When the water appears at the overflow-nozzle, indicating that the injector is full, the valve-stem G1 is manipulated so as to close passage e* and open passage c, when the steam, passing by jet f, will cause the injector to operate in the usualmanner.

When it is desirable to lift the feed-water, or`

start the injector by the jet f,which can only be done advantageously where the feed-water is cold, the reducer l1, is moved against the jet f by the eccentric 7c until the steam is reduced the desired amount `to pass freely through the combiiiing-tube, and create a draft or vacuum, the water entering the combiningtube through the perforations n of the reducing-cylinder. When the water appears at the overflow the reducing-cylinder can be drawn back, to give more steam and water supply to feed into the boiler.

The advantages arising from my invention are, that either hot or cold feed-water can be lifted to any practicable height. The` water can be delivered regularly, as in supplying a boiler by a pump, and the combining-tube and delivery-tube being fixed at a given distance apart, where they work to best advantage, the volume of water can be reduced without dis' tiirbing their relation.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, is

l. In combination with the steam-jet and combining-tube of an injector, the reducingcyliuder, movable on the combining-tube, substantially as aud for the purpose specified.

2. 1u an injector, the combination of the jet, the combining-tube, and the perforated reducing-cylinder, movable on the combiningtube, substantially as and for the purpose specified,

3. The combination ofthe auxiliary jet with the discharge end of the combining-tube and the delivery-tube. and inclosing the same, substantially as and for the purpose specified.

'4. In an injector, the hollow cylindrical double-seated overflow-valve, substantially as and for the purpose specified.

5. In combination with the doiible'seated hollow cylindrical overflow-valve, the centra-l valve for closing the overiownozzle, substantially as specified. u

In testimony whereof I, thesaid JULiUs PROEGER, have hereunto set my hand.

J ULIUS PROEGER. XVitnesses:

F. W. Rrr'risn., Jr., FRANK W. Siurrn. 

